Question

In SQL Server, how can I insert data into a table that has just one column which is of identity type?
Such as insert into the following table t.
How can I write the insert statement?

CREATE TABLE t
(
    id INT IDENTITY(1, 1) PRIMARY KEY
)

Great thanks.

Answer 1

To insert a single value

INSERT T DEFAULT VALUES 

Or to insert multiple rows on SQL Server 2008+

MERGE INTO t
USING (SELECT TOP 100 *
       FROM master..spt_values) T
ON 1 = 0
WHEN NOT MATCHED THEN
  INSERT
  DEFAULT VALUES; 

To insert multiple rows in a single statement on previous versions would require the values to be entered explicitly, e.g. as below.

SET IDENTITY_INSERT t ON

INSERT INTO t
            (id)
SELECT TOP 100  
               (SELECT ISNULL(MAX(id), 0) FROM   t (TABLOCKX)) + 
                            ROW_NUMBER() OVER (ORDER BY @@SPID)
FROM   master.dbo.spt_values

SET IDENTITY_INSERT t OFF